Triethylamine → HCID 50913358, compound

Temperature

65 °C

400 mg (2.6 mmol) of 3-cyclopropyl-isoxazole-4-carboxylic acid were suspended in 10 mL of toluene and one drop of dimethylformamide was added to the mixture. 0.24 mL of thionylchloride (3.3 mmol) were added at room temperature and the reaction mixture was stirred at 65° C. for two hours. After removal of the solvent, toluene was added and the evaporation was repeated. The obtained residue was then dissolved in 5 mL of dichloromethane and the solution was added dropwise to a solution containing 246 mg pyridin-3-ylamine (2.6 mmol) and 0.45 ml triethyl amine (3.3 mmol) in 5 ml dichloromethane. The mixture was stirred at room temperature for 16 h and the solvent was removed under vacuum. The residue was purified by flash column chromatography (silica, gradient elution cyclohexane→ethyl acetate→methanol) and the solvent was removed under vacuum to give 436 mg (69%, 95% purity) of the title compound as a brown solid.

1. customAfter removal of the solvent, toluene
2. additionwas added
3. customthe evaporation
4. dissolutionThe obtained residue was then dissolved in 5 mL of dichloromethane
5. additionthe solution was added dropwise to a solution
6. stirringThe mixture was stirred at room temperature for 16 h
7. customthe solvent was removed under vacuum
8. customThe residue was purified by flash column chromatography (silica, gradient elution cyclohexane→ethyl acetate→methanol)
9. customthe solvent was removed under vacuum

ORD record

ord-f8f8674537ee42e1b1cc591479683bb9

Source dataset

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09125414B2